Final (I hope!) resolution of my bike battery problem. After the repaired battery was reinstalled and blew another fuse on 3July, I contacted Himiway and they said they would replace battery, battery bracket and controller. The battery is out of stock while the controlled was in stock so I asked that they send me the controller ASAP. After a few days and emails where they finally explained that I had to send a $99 deposit for the warranty controller replacement, I paid it on 7July and received a tracking number. In the meantime Himiway refunded the HiC battery repair charge of $140 (minus 5% PayPal fee) and my husband replaced the battery fuse since Hi-C made the fuse holder accessible. I received the replacement controller on 23July, we promptly installed it and the bike comes on and seems to perform well. So now at the end of July I can finally ride again after the early May malfunction. I have to return the defective controller for a refund of the deposit and after suppling the package size and weight, I’m now waiting for a shipping label from Himiway. While this has been an extremely protracted process with over 45 emails, at least the bike is fixed. The delays are due to communication issues (Himiway is responsive but they only reveal the procedure a tiny step at a time) as well as the shipping time between China and the US. In retrospect, if I had understood the limitations of the Himiway warranty and lack of US-based service I would not have bought this bike.